1 Low cost (1) Disposable investment Disposal sand thermal core box process (core) disposable one -time investment is a hot core box shape (core) machine and mold. The price of each unit (core) machine is 1.5 ~ 3. O97 is ranging, each set of molds is 0.6 to 100,000 yuan. The fusion mold casting type has a large investment in one -time investment, including molds, wax pressing machines, wax furnaces, wax chip machines, wax stirring machines, rainy sand sprinkler, boiling sand sprinkler, dewaxing pond, baking furnace, etc. Essence (2) The production cost of low membrane sand craftsmanship is only golf sand and de -molding agent. Diesel, etc., there are many types of materials and high costs. There is only one shape (core) machine consumed by the sedimental sand craftsmanship, while the melting mold casting and building consumption equipment consumes a lot, and the total energy consumption is large. 2 The shell -making link is small and high efficiency.